add level table JSON format

system/item-tables/item-parameter-table-gc-v3.json

@@ -1,4 +1,6 @@
 {
+  // This file matches what's in the client's ItemPMT file. Modifying this file will not affect the client; it only
+  // exists so the server can match the client's behavior.
   "ArmorSaleDivisor": 0.79999995231628418,
   "ArmorStatBoostIndexes": [],
   "ItemCombinations": [
@@ -2351,4 +2353,4 @@
     {"UnknownA1": 100.0, "UnknownA2": 10.0, "UnknownA3": 0x10000, "UnknownA4": 0x1555, "UnknownA5": 0x4}
   ],
   "WeaponStatBoostIndexes": []
-}
+}